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Sub woofer has a hum

I have a Pioneer sub woofer in my home surround sound system. It has a hum when it is plugged in that really annoys me, so I unplug it when not in use. Is there a way to stop this humming sound?

Posted by Robbie Harrison on

  • Anonymous Mar 14, 2014

    Every now and then...when I power up my system, the sub-woofer will not come on (no sound and no lit light on the front), the only way I can remedy this if to physically unplug the subs power cord and leave unplugged for about 15 minutes,then plug it back in, it will work fine after that...until the next time it happens. There is no rhyme or reason, it just keeps happening at different times. Very annoying, call the company to no avail, help !!!!

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carpo420

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I have found that with other appliances running, or a busy circuit, I have the same problem. Try to turn everything else in the house off and check again....A/C are often culprits. You can buy a line isolator for the plug, although they are just more money to spend. If this doesn't work, well, it could be a crappy home theaater receiver. It happens

Posted on Aug 08, 2008

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1 Answer

I wish to replace a subwoofer on a surround sound system


In most surround sound systems the sub woofer is powered separately and uses a standard RCA coax connection to the receiver/amplifier.

Replacing is simply plugging in the new and reconnecting the coax cable.

Usually the audio signal is Dolby Digital 5.1 the (.1) is the LFE Sub-woofer. The connection is between the Subwoofer RCA connector on the amplifier and connects to the (LFE-Line) in on the subwoofer speaker.

Hope this helps?

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Pioneer cx4000 home stereo no rear speakers/subwoofers very low sound. only surround sound works normally


Either the sub woofer speaker or the sub woofer amplifier section circuit has the fault. Contact any service technician to make diagnosis the faulty section. If you wish to get some details; check the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/
Circuit diagrams of many popular brand devices are given. Search the site by type in the "brand name" of your device, in the "Search box at the top right of the display window of the Homepage" to get gathered related posts.

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I just got my system today. All the speakers are working, except the sub-woofer. Any ideas what could be wrong (if not DoA)?


Did you connect power to the sub-woofer? Most subs have their own amplifier. Just check if there is also an on / off switch on the sub.

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I have a Fisher RS-909 Surrond Sound amplifier. It has no "sub out" jack. I had the sub-woofer working in the past by wiring it as shown in the manual. The problem is that the system was in...


Alright i had a chance to look over things, this is how you are going to hook up the sub. first we'll be connecting the surround sound unit to the sub woofer.
surround sound unit sub woofer
left front: positive (+) <-----to------------->(+) left speaker level in
negative ( - )<- - -to- - - - - - ->( - ) left speaker level in

right front: positive (+) <-----to------------->(+) right speaker level in
negative ( - )<- - -to- - - - - - >( - ) right speaker level in

now that the surround sound unit is connected to the sub woofer you will need to connect the front surround sound speakers to the sub woofer.
sub woofer front surround sound speaker
left speaker level out (+)<-----to--------> (+) left front speaker
left speaker level out( - ) <- - - to- - - - ->( - ) left front speaker

right speaker level out (+)<-----to--------> (+) right front speaker
right speaker level out( - ) <- - - to- - - ->( - ) right front speaker

Alright now that the wires are all over the place and plugged in
turn everything on and see how it sounds. let me know if everything is working as it should. if you need help with anything else or if something does not seem right please feel free to contact me via e-mail or phone
Mark Woodring

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1 Answer

Low level hum noise from sub-woofer, once it warms up.


You could try cleaning both the female ports you are connecting to along with the cables ends you are interting with DeOxit. Sometimes they both develop oxidation over time. Good luck! http://store.caig.com/s.nl/sc.2/category.188/.f

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JVC TH-M45


no, u cant use the speakers with other normal DVD player because it wont have amplification for the speakers... u can use the sub to other dvd player because its inbuilt 120 watt woofer. ur dvd player is 5-disc player as wel as 120 X 2 and 80 X 3 watts amplifier (AV receiver ).... so just the JVC better sound thru the sub and speakers... ENJOY

[email protected]
www.kanny-sounds.blogspot.com

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1 Answer

I HAVE JVC SURROUND SOUND SYSTEM MODEL SP-PWM 45,I HAVE LOST 8 PIN CONNETOR FROM MAIN AMP TO SUBWOOFER. WHERE CAN I PURCHASE THIS CONNECTOR THANKS


Here is a link to the system cable that I think that you are reffering to. The model number of the system you have is TH-M45

The model number you gave is for the sub-woofer only. This is the system cable that is required to connected between the sub-woofer and the main head unit with the DVD changer in it.

http://www.jvcservice.com/store/ProductDetail.asp?Part=QAM0381-001%20%20%20%20

If you can not click on the above link, just copy the entire link and paste it into the address bar of your interent browser.

Since this is the part you want and it is the cheapest place to purchase it, a rating of "FixYa!" would be appropriate and very much appreciated. After all, it is the only reward we get for offering people like yourself this free technical support.

Thanks,
Dave

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